Signed 16-bit integers are incorrect in figure

[jlelia]

In the first figure of the Datatypes module, a 16-bit signed integer (1111111111111111) is reported as -65536, but that would be a 17-bit (11111111111111111) signed integer. Signed integers have half the absolute range given one bit is used for the sign.

I think the goal may have been closer to showing something like:
1000000000000000 = −32,768
1000000000000100 = −32,764